Manufacture of harmless combinations of sulfocyanic acid.



Ito-Drawing. Original application filed May 2, 1911, Serial No. 624,602. Divided and this application filed Un rrnn STATES PATENT onnion.

JOSEPH NERKING, -01 DUSSELDORF, GERMANY, ASSIGNOR TO CHEMISCHE FABRIK BEISHOLZ, G. M. B; IL, OF DUSSELDORF-REISHOLZ, GERMANY.

MANUFACTURE OF HARMLESS COMBINATIONS OF SULFOCYANIC ACID.

Specification of Letters Patent.

' Patented Dec. 5, 1911.

August a, 1911. Serial No. 642,201.

To all whom it may concern:

Be it known that I, JOSEPH NERKING, a citizen of the Empire of Germany, residing at Dusseldorf, in the Empire of Germany' have invented a new and useful Manufacture of Harmless Combinations of Sulfocyanic Acid, of which the following is a-specification.

This application is a division of an application filed by me May 2nd, 1911 under Se mitis, also as antispasmodics and sedatives,

but they are objectionable on account of their poisonousness, for which IcZlSOIl they are nearly no longer employed.

My invention relates to the manufacture of new combinations of sulfocyanic acid, which are harmless and therefore suitable for medical purposes.

The invention essentially consists in the combination of salts of sulfocyanic acid with albumen of any description, either alone or in conjunction with other substances.

. When saltsof sulfocyanic acid are mixed with albumen in the dry or moist condition or with solvents, solid gummy bodies or solutions of the same respectively will be formed, which bodies when dry are partly difiicultly soluble in water or spirit of wine and partly insoluble. The soluble part of the bodies coagulates on boiling the solution, also on the addition of stronger acids, while the insoluble part simply swells up in water. Both parts contain more or less sulfocyanic acid (HCNS) in proportion to the concentration of the reacting solutions. Such combinations of the sulfocyanic acid may be formed from animal albumens (ovalbumen, casein) as well as from vegetable albumens; however, the casein and the vegetable albumens require to be first dissolved by the addition of-an alkali 01' an alkaline earth, such as for example carbonate of sodium or hydrate of lime.

The mixing of the salts of sulfocyanic acidwith albumen ground as finely as pos sible does not present any difficulties, provided that the quantities are small, the mixture agglomerates and forms a plastic mass, which is dried at a moderate tem erature, preferably at 40 centigrade. hen the quantities are a little larger, it is advisable to add so much water or rather spirit of wine as to render the mixing easy. For larger quantities it is best to let the two components, viz. the albumen and the salt of sulfocyanic acid, act upon each other in a watery solution, or the salt of sulfocyanic acid may be added undissolved or in an alcoholic solution. The sulfocyanate of albumen may be precipitated from the solution thus obtained with the aid of spirit| of wine, whereupon the sediment can be separatedby pressing to be dried at a temperature of about 40 centigrade. 1

It does not matter, whether sulfocyanate of ammonium or'sulfocyanate of potassium or sulfocyanate of sodium or sul-focyanate of calcium or sulfocynate of strontium or any other salt of sulfocyanic acid be employed inthe process, since in the combination with the albumen only the sulfocyanic acid is a considerable component.

1 claim:

1. The method of manufacturing harmless combinations of sulfocyanic acid, which consists in dissolving an albumen in a solvent, adding a salt of sulfocyanic acid, precipitating sulfocyanate of albumen with the aid of spirit of wine, separating the sediment by pressing, and drying the mass.

2. The method of manufacturing harmless combinations of sulfocyanic acid, which consists in dissolving an albumen in 2. sol

vent, adding an alcoholic solution of a salt of sulfocyanic acid, precipitating sulfocyanate of albumen with the aid of spirit of wine, separating the sediment by pressing, and drying the mass.

JOSEPH NERKING. [1,. s.] itnesses:

ALBERT F. NUFER, Lo'r'rA LARKMANN. 

